More details on the new patch can be found in a recent blog post by Kyle Huey, its creator.

The Add-On SDK

Of course, it's a rare patch that fixes any problem in one fell swoop without any side-effects, and this latest one is no exception.

To wit: At least one add-on--Wallflower, to be specific--appears to cause a new problem once the patch is applied. Turns out, however, that the glitch occurs only in add-ons built with older versions of the add-on SDK, Nethercote reported.

As a result, Mozilla asks users of the Firefox Nightly builds to file bugs if they see similar problems in any of the add-ons they use.

“Firefox 15 is scheduled for release on August 28th,” he concluded. “We need as many affected add-ons to be rebuilt with the latest SDK before that date to minimise potential problems.”